化学实验要中的安全（Safety in Chemistry Experiments）.docVIP

化学实验要中的安全（Safety in Chemistry Experiments） Safety in Chemistry Experiments Luan Chunwu, the first middle school of Xuanhua County, Hebei Province Human life is precious, for people, life only once, so the chemical experiment should pay attention to safety, therefore, the safety of chemical experiment has always been the focus of the college entrance examination proposition. On the one hand, it examines the prevention and treatment of common chemical experiments, and on the other hand examines the basic experimental operations of the candidates. The topic is generally simple, so pay attention to it in the pro forma review. Chemical experiments and research should pay attention to safety problems, from the storage of reagents, reagents used, experimental operations and experimental process, waste liquid and other waste treatment. For example: the oxidizing and reducing agents can not be stored together; the take by hand directly to get by chemical reagent; the nose can not be used directly in the alcohol smell gas; the amount of alcohol should be appropriate; the alcohol lamp burning not to add alcohol; the igniting flammable gas before the inspection of pure heating; solid tube mouth is slightly lower than the bottom of the heating tube; the liquid should be put to a porcelain; heating and washing gas (or gas absorption device) experiments to prevent reverse absorption of liquid; the concentrated sulfuric acid to make the device into the water slowly along the wall and diluting concentrated sulfuric acid. [example 1] we must pay attention to safety when conducting chemical experiments A. accidentally splash an acid into your eyes. Rinse immediately with water and blink while washing B. inadvertently concentrated the alkaline solution onto the skin. Rinse immediately with plenty of water, then apply a boric acid solution C. if concentrated solution of phenol touches the skin, wash it immediately with alcohol The preparation of D. sulfuric acid solution, adding a certa